New/Nervous and Poor

I don't even know where to start, we are about a month in on Kismet's diagnosis and treatment and the expense are causing panic. I have been trying to navigate online sites, but I am now overwhelmed by all the information. I don't know where else to go ... I don't want to have to give him away or put him down ... I have no job at the moment, paying for health insurance and now trying to navigate this. I'm going to have to sell some jewellery off soon.
Yeah, I am complaining, but I am also scared. Terrified. I love my cat. I want to be able to keep and treat him.